Most of the 'new inventions' of WW2 wasn't so new. Atomic bomb was invented 1934, while foundations for it was made 1905. The actual work for to build one started 1939 and it get ready on 1945.
For high speed torpedos, I could build one with 30g or more acceleration. But it just wouldn't work more than part of second and I could lose some bodyparts, so I don't do it.
Keith Curtis says in
Software Wars (it's free) pg.53:
Imagine 1,000 people, broken up into groups of five, working on two hundred separate encyclopedias, versus that same number of people working on one encyclopedia? Which one will be the best? This sounds like a silly analogy when described in the context of an encyclopedia, but it is exactly what is going on in artificial intelligence (AI) research today.
As the ant and human use same operating system, the AI could have build years ago, if it was made in opensource.
And for our neighbours. I think, after the threshold, the start of exploration is always fast, but when you get couple of habitable planets, expedition is on ice until you get them independent and slow after that. It is like australia, nobody wanted it on 200 years, because there were more important things to do. Orgus contacted us because they hadn't other choice. Otherwise they had jumped on to next system, using us as buffer and forgot us.